A more thorough explanation:

confirmavi

Confirmavi is a Latin word that means "I have confirmed." It is often used in historical documents as an emphatic word in a deed of confirmation.

• The king confirmavi the land grant to the nobleman.
• The bishop confirmavi the appointment of the new priest.

These examples show how confirmavi is used in historical documents to indicate that someone has officially confirmed or approved something. In both cases, the word emphasizes the importance and authority of the confirmation.